硫酸介质中EDBDP对Q235钢的缓蚀作用
Inhibition of EDBDP for Q235 Steel in Sulfuric Acicl Solution
摘 要
合成了O, O′-二苄基二硫代磷酸-N, N-二乙铵(EDBDP), 采用电化学法和静态悬挂失重法研究了EDBDP在5% H2SO4介质中对Q235钢的缓蚀性能。静态悬挂失重法研究表明, 25 ℃时, 在5% H2SO4溶液中, 当缓蚀剂浓度为100 mg/L时, 缓蚀率高达99.29％; 动电位极化曲线研究表明, 该缓蚀剂受H2SO4浓度、温度和浸泡时间的影响较小, 属于混合型缓蚀剂; 吸附拟合表明, 缓蚀剂在Q235钢表面的吸附符合Langmuir吸附等温式, 属于自发进行的化学吸附。
缓蚀剂
Q235钢
吸附
O, O′-dialkyldithiophosphate
corrosion inhibitor
Q235 steel
adsorption
Abstract
A new corrosion inhibitor named N, N-diethylammonium O, O′-dibenzydithiophosphate (EDBDP) had been synthesized and the inhibition was investigated for Q235 steel in 5% H2SO4 solution by weight loss tests and electrochemical techniques. The studies of weight loss showed that the inhibition efficiency was up to 99.29% when the inhibitor concentration was 100 mg/L in 5% H2SO4 solution at 25±1 ℃, and the adsorption of EDBDP on Q235 steel surface obeyed the Langmuir's isotherm. The electrochemical studies revealed that the inhibitor was mixed-type inhibitor, whose inhibition efficiency was hardly affected by concentration of H2SO4, temperature and immersion time.
中图分类号 TG174.42
所属栏目 试验研究
基金项目 材料腐蚀与防护四川省高校重点实验室重点项目(2008CL03); 四川省教育厅重点项目(09ZA057); 四川省科技厅科技支撑计划项目(2010GZ0130); 四川省自贡市科技局重点项目(08X01)
收稿日期 2010/5/2
修改稿日期 2010/5/19
网络出版日期
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引用该论文: XIE Bin,LAI Chuan,ZOU Li-ke,HUANG Chun,FENG Jian-shen,ZHAO Bin,HE Lin-xin. Inhibition of EDBDP for Q235 Steel in Sulfuric Acicl Solution[J]. Corrosion & Protection, 2011, 32(3): 166
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参考文献
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【4】陈云, 唐永明, 杨文忠, 等. 盐酸介质中3, 5-二(2-噻吩基)-1, 2, 4-三唑(2-TAT)对紫铜的缓蚀作用[J]. 腐蚀科学与防护技术, 2009, 21(4):406-409.
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【8】Bentiss F, Bouanis M, Mernari B, et al. Understanding the adsorption of 4H-1, 2, 4-triazole derivativeson mild steel surface in molar hydrochloric acid[J]. Applied Surface Science, 2007, 253:3696-3704.
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【10】Quraishi M A, Sharma H K. 4-Amino-3-butyl-5-mercapto-1, 2, 4-triazole:a new corrosion inhibitor for mild steel in sulphuric acid[J]. Materials Chemistry and Physics, 2002, 78:18-21.
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【12】Shukla S K, Quraishi M A. The efects of pharmaceutically active compound doxycycline on the corrosion of mild steel in hydrochloric acid solution[J]. Corrosion Science, 2010, 52(2):314-321.
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